Boiler



June s, 1928. I 1,672,617

G. LASKER BOILER Filed Aug. 12, 1922 2 Sheets-Sheet l G. LASKER BOILERJ\ime5,1928. 1,672,617

Filed Aug.l2, 1922 2 Sheets-Sheet 2 Patented June 5, 1928.-

' "mammalian; or CHICAGO, rtztmorsi i w. I

norms.

Application filed August a, is: sens-1 no. 501,520:

My invention relates to boilers, and more particularly to meansv forforcing the fluid passing therethrough into more intimate contact withthe, heating, surfaces and increasing the heating effect.

The invention has among its other objects the production of a device ofthe kind de-' scribed which is simple, convenient, compact, durable,reliable, efficient and satisfactory for use wherever found applicable.

Another object of my invention is to .provide means in the tubularpassages of a boiler for spirally directing the passage of the fluidtherethrough, or, in other words, imparting a swirling movement thereto,which means are also adapted to be moved longitudinally within thepassages so as to frictionally engage the bounding Walls of the passagesand'remove any scale and soot or other foreign matter adhering thereto.

Many other objects and advantages of the construction herein shown anddescribed will be obvious to those skilled in the art fro thedisclosures herein. given.

To this end my invention consists in the novel construction, arrangementand combination of parts herein shown and described, and moreparticularly pointed out in the claim.

In the drawings, whereln like reference characters indicate like orcorresponding parts,

Figure l is a side elevation of-a boiler showing one of thefluid-directing vanes in place; Y

Figure 2 is an enlarged fragmentary elevation of the same;

Figure 3 is a'section substantially on th line 3-3 of Figure 2;

Figure 4 is a fra-gmentaryxsection through a Water tube boiler showingthe fluid-directing means as arranged within the water tubes;

Figure 5 is an enlarged detail of the fluiddirecting means in place'inone of the tubes.

In the drawings, wherein I have illustrated a preferred embodiment of myinvention, 1 indicates a boiler of any preferred design, shape andmaterial having a plurality of flues 2 arranged longitudinally thereofand through which the heating medium mustpass in order to contact withthe water contained in the drum. Removably positioned in one or more ofthe fines, and preferably in each of them, are cores or vanes 3 fordirecting the heating medium in a predetermined path,v saidfluid-directs. ing means in this particularinstance coni- Y prises alongitudinally-extending bar of S- shaped cross-sectiomas shown mostclearly v in Figure 3, and of a width substantially equal to the innerdiameter of. the flue, so as I tofrictionally contact with the innerwall thereof when inserted therein.

The member 3 is twisted spirally along its length, as shown, so that thesides thereof engage the inner wall of the flue along spiral lines.Thus-it will be apparent that any of the heating fluid passing throughsaid passages or fiues will be directed inspiral paths longitudinally ofthe flues, and thus will not only increase the velocity ofthe fluid, butwill force it into more intimate heating contact'with the surroundingportions of the water .drum, thus increasing the efliciency thereof.Asbefore noted, the member 3 may be movable longitudinally .of the tube,so that any soot or other foreign matter adhering to the inner surfaceof the flue will beremoved therefrom whenever said member 3 isreciprocated Within the flue.

An opening 4 maybe provided at one or both ends of the member 3, so asto assist in drawing said member into the flue by means of a cable orthe like, or in engaging it by any suitable cooperating means forreciprocating it duringits cleaning action.

' In the modification shown in Figures 4 and 5, the member 3 ispositioned centrally within and extending longitudinally of the steamtubes 5 of a Water tube boiler 1', so

as to impart a spiral or whirling movement of the steam passing throughsaid tubes,

thus forcing itcinto a more intimate contact withthe heated tubes,preventing the burning of said tubes and increasingthe heating effect.

the inner surface of the water tubes.

Having thus described my invention, it is obvious that various"immaterial modifications'may be made in the same without departing fromthe spirit of my invention;

hence I do not wish to be understood as limiting myself to the exactform, construction, arrangement, and combination of parts herein shownand described or uses mentioned.

What I claim as new and desire to secure by Letters Patent is:

In combination, a boiler having a plurality of tubes therethrough forthe passage of fluid, and core members arranged within the 10 tubes andengaging theinner faces of the v walls of the tubes, said core memberseach tral part to its side edges, and said strip be-' ing twistedlengthwise thereof to extend in spiral formation.

In testimony whereof I have hereunto signed my name. V

GEORGE LAISKER.

